SMALLRIG HDMI Cable Clamp for Blackmagic Video Assist Monitor Cage, G7/GH4/GH3 Cage, BMMCC Cage - 1693 SmallRig HDMI Cable Clamp 1693 can provide strain relief for Micro-HDMI cable where frequent tugging could cause damage to the camera. With only one screw to mount to the cage and lock the cable, it can save space for other accessories. The HIDM Lock can only be used on SmallRig Cage 1779 (for Panasonic G7), SmallRig Cage 1773 (for Blackmagic Micro Cinema Camera), SmallRig 1585 (for Panasonic GH4/GH3), and SmallRig 1830 (for Blackmagic Video Assist 7" Monitor), SmallRig Cage 1726 ( for Blackmagic Video Assist 5" Monitor). Lock just use a 1/4"-20 screw on the cage, you could attach more accessories. The unsmooth surface (the part clamping the cable) of the cable clamp can increase friction in case of the accidental removal. HDMI lock could be adjusted in width for Micro-HDMI cables of different standards. Made of 6061 aluminum alloy, surface is very smooth after hard oxidation. Very comfortable to use. Please kindly read which camera cage it will be used on before purchasing.